Oxygen, carbon and ecosystem metabolism in lakes and streams

Photosynthesis, respiration and air-water exchange are the main processes behind ecosystem metabolism. We apply sensor measurements of oxygen, inorganic carbon, nutrient and algal biomass in the free water and meteorological measurements of light, wind, temperature to calculate ecosystem metabolim and the main drivers behind ecosystem metabolism and concentrations of oxygen and carbon dioxide.

We can use the research to reveal: 1. Why anoxia and fish kills occur, 2. How eutrophication can influence carbon dioxide exchange with the atmosphere, 3. How closely respiration is coupled to organismic production within the system or transfer from outside. We have recently showed how a carbon circulation pump, offering recurring regeneration of inorganic carbon, can ensure high photosynthetic production of macrophytes in nutrient-poor waters


Name Title Phone E-mail
Kaj Sand-Jensen Professor +4535330124 E-mail

Funded by

Aage V Jensen Naturfond logo
Period: 2017-2020
PI: Kaj Sand-Jensen


Professor Kaj Sand-Jensen
Freshwater Biology Section
Universitetsparken 4
DK-2100 Copenhagen Ø

Phone: +45 3533 0124

External members

Name Title Affiliation
Theis Kragh Associate professor SDU